Mine gives me black screens at certain levels (sound and menu works, just no game)
Also, I can never use my workbench for some reason, and I get random freezes.
With an unmodded xbox too. I even brought it back because if the errors, got a new xbox and new copy of kotor2, and same problems, minus the workbench thing happened wit hthe new one.
Its not just me either, check out the bugs section of the Obsidian forum, I'm kinda dissapointed.